Poultry Judging Practice Test

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Study for the Poultry Judging Test with interactive quizzes. Enhance your skills with multiple choice questions including hints and explanations. Prepare for your exam and excel!

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Which hormone is known to stimulate egg laying?

Oxytocin
Thyrotropin
Progesterone
Estrogen

The correct answer is: Oxytocin

The hormone that is known to stimulate egg laying in birds is estrogen. Estrogen plays a critical role in the reproductive cycle of chickens and triggers the development of the follicles in the ovaries, ultimately leading to ovulation and the release of eggs. It acts to prepare the reproductive system for egg production and influences various physiological changes necessary for laying. While hormones like oxytocin are important in mammals for reproductive functions, such as milk ejection, they do not play a significant role in avian egg laying. Thyrotropin is involved in regulating metabolism and does not have a direct influence on egg production in birds. Progesterone, while also crucial in the reproductive processes of various species, does not primarily stimulate egg laying in poultry. In summary, estrogen is the key hormone that directly stimulates the laying of eggs in birds, making it the correct answer in this context.